Pinhole grate bar



Patented Nov. 4, 1924.

UNITED STATES gPA'lfElNrf OFFICE L JOHN L; NUTE, or' cnnivrnnasnnne, `rnNNsvLvnNIA, AssiGNoR ro NUTE, Marianne, GEARY coMPaNjniNc., or CHAMBERSBURG, PENNSYLVANIA.

yrrNHoLE onn'rn BAR.

Application led June 21,

To all whom t may concern:

Be it known that I, Jol-1N L. Nu'rn, a citizen of the United States, residing at Chambersburg, in the countyA of Franklin and State of Pennsylvania, have invented a new and useful Pinhole Grate Bar, of which the following is a specification.

By way of explanation it may be stated that large deposits of river coal, so called, are available, river coal being an eXceedF ingly fine alluvial deposit. Owing to its fineness, river coal cannot be burned on a grate comprising bars of the ordinary construction, and this invention aims to provide a simple but eficient means whereby an ordinary grate may be made available for burning river coal, withoutV working any changes in the standard form of the grate.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in side elevation, a grate bar whereon the device forming the subject matter of this application has been mounted; Figure 2 is a top plan, showing two cap pieces, constructed in accordance with the invention, placed in operative relation to each other; Figure 3 is a side elevation of the cap piece, the grate bar appearing in section; Figure 4 is a section on the line 4 4 of Figure 3.

The numeral 1 denotes a grate bar, having grooves 2 in its opposite sides, the grooves generally being V-shaped in cross section.

In carrying out the invention, there is provided a metal cap piece 3 including a body 4 which is bifurcated to form legs 5, the legs having V-shaped inner edges 6, and being provided with V-shaped outer edges 7. The body 4 is surmounted by an arcuate head 8, connected to the body by thinned 1922. serial No. 569,310.

webs 9, the body, the head and the websV being formed integrally. The fuel supporting surfaces of the head 8 slant transversely in opposite directions, as shown at 10, from a central line 11, the end edges of the head slanting inwardly, as denoted by the numeral `12. In the transverse edges of the head 8, notches 14 are formed.

In practical operation, the cap piece 3 is seated astride of the grate bar 1, the inner edges 6` of the legs 5 being received in the grooves 2 of the grate bar 1, and the cap piece being supported by engagement between the body 4 and the grate bar l, as shown in Figure 3. The head 8 of one capV piece abuts against the head of ank adjoining cappiece, as shown in Figures 1 and 2, the notches 14 in the heads 8 of adjoining cap pieces cooperating to form reduced openings 16. The slanting fuel engaging surfaces 10 of the head 8 of one cap piece cooperate with the corresponding surfaces of the head of an adjoining cap piece, to define transverse grooves 15 which serve to hold the fuel, the ashes finding their way readily'through the openings 16.

It will be seen that the device forming the subject matter of this application affords a means whereby an ordinary grate, without working changes therein, may be adapted to burn river coal, or other fine fuel.

Owing to the fact that the body 4 and the head 8 are connected by the web, the cap piece is reinforced and strengthened. Since the webk is thinned, the ashes can find their way downwardly and outwardly, after the ashes have passed through the openings 16 defined by the'notches 14. It is tovbe observed that, as shown at 17, the upper edges of the body are inclined laterally, and slant downwardly and outwardly. Owing to this construction, the ashes which pass through those openings 16 which are adjacent to the central portion of the cap piece, will be carried laterally and outwardly and will not lodge upon the upper portion of the body 4, and clog the openings 16 which are thereabove.

A cap piece for a gratebar, comprising a bifurcated body and a head surmounting the body, the head being 'provided with notches in its opposite edges, the fuel-receiving surface of the head slanting in opposite directions toward the notches, thereby to form approximately V-shapcd undulatons when the headsy of aydj @cent cap Vpieces are in abutment, the notches n the heads of as my own, I have heretol axed my signs1- ture 1n thc prsence of two v'vltnsss.-

adjacent cap pieces defining openings 1o- JOHN L. NUTE. 5 cated n the lowermost portions of the un- W'tnesses: Y l

dulatons. A. J. MCGEHEE,

In testimony that I claim the foregoing Enw. V. GEARY. 

